Substack Archive Search - Substack Post Indexer

Name: Substack Archive Search - Substack Post Indexer
Rating: 5 (1 reviews)
Author: Neo Cortex

By: Neo Cortex

Search any Substack archive instantly. Build a private, offline index to find posts by title or full-text

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Install

Features & Capabilities

Substack Archive Search lets you index, search, and browse entire Substack publications locally — with no backend and full privacy. Build your own offline, searchable archive of Substack posts and instantly find what you’re looking for.

Whether you’re a researcher, writer, journalist, or power reader, this extension turns any Substack into a fast, personal knowledge base.

🔍 Powerful Local Search

Instantly search posts by title.
Sort and filter large archives with pagination
Jump directly to any post in the publication’s history Pro users can unlock full-text search across entire articles.

📂 Local Archive Indexing

Index thousands of Substack posts directly in your browser
Data is stored locally using IndexedDB Once indexed, your archive is available even offline.

💎 Deep Search (Pro) Upgrade to Pro to enable deep indexing, which downloads and indexes the full text of every post.

Search inside article content
Find exact phrases, topics, and references
Ideal for long-running newsletters and research-heavy publications

🔒 Privacy-First by Design

All data stays on your device
No cloud storage -No tracking
No data resale Your reading history and indexed content are never uploaded anywhere.

⚡ Fast & Efficient

Optimized local indexing and search
Built for large archives
Faster than Substack’s built-in search

🎯 Perfect For

Researchers exploring long-running Substack archives
Writers collecting references and inspiration
Newsletter readers managing multiple subscriptions
Anyone who wants fast, offline access to Substack content

🛠️ How It Works

Visit any Substack publication (including custom domains)
Open Substack Archive Search
Index the archive (shallow or deep)
Search and browse instantly

🆓 Free vs Pro Free includes:

Shallow indexing (titles)
Local archive browsing
Basic search and sorting

Pro unlocks:

Deep indexing with full-text search
Unlimited indexing
Advanced controls

Stop scrolling endlessly through old posts. Explore Substack archives the smart way: locally, privately, and fast.

Extension contains links to other useful free tools from the developer.

User Growth & Download Statistics

Add-on

By:

Neo Cortex

Daily users:

Rating:

5.00

(1)

Version:

1.0.3 Last updated: 2026-05-20

Version code:

6266147

Creation date:

2026-05-17

Risk:

Permissions:

Host permissions:

<all_urls>

Content scripts matches:

<all_urls>

Size:

3.85MB

Email:

ne*****@gmail.com

URLs:

Website ,Privacy policy

Full description:

Source:

Firefox Add-ons Store

Data ingested on:

2026-06-03

Compare stats and ranking:

Ranking

# 76,637 ▲

Other rankings

#172 in post keyword 21 ▲

For Developers

Monetize with App Pass Boost with Extension Booster

Contact the developer

Chrome-Stats does not own this Firefox add-on. Please use these information below to contact the Firefox add-on developer.

Developed by:

Neo Cortex

Firefox Add-ons Store

https://addons.mozilla.org/firefox/addon/substack-archive-search/

Email:

ne*****@gmail.com

Website:

https://www.neocortexai.in/#contact

Is Substack Archive Search - Substack Post Indexer Safe?

Risk impact

Risk impact measures the level of extra permissions an extension has access to. A low risk impact extension cannot do much harms, whereas a high risk impact extension can do a lot of damage like stealing your password, bypassing your security settings, and accessing your personal data. High risk impact extensions are not necessarily malicious. However, if they do turn malicious, they can be very harmful.

Substack Archive Search - Substack Post Indexer requires a few sensitive permissions. Exercise caution before installing.

Risk impact analysis details

Critical Allows access to all websites, posing a significant security risk as it can monitor and modify data from any visited site.
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Risk likelihood

Risk likelihood measures the probability that a Firefox add-on may turn malicious. This is determined by the publisher and the Firefox add-on reputation on Firefox Add-ons Store, the amount of time the Firefox add-on has been around, and other signals about the Firefox add-on. Our algorithms are not perfect, and are subject to change as we discover new ways to detect malicious extensions. We recommend that you always exercise caution when installing a Firefox add-on.

Substack Archive Search - Substack Post Indexer is recently added, and hasn't been around long enough for us to gather enough data to accurately assess its risk level.

Risk likelihood analysis details

High This extension was recently updated in the past month. New updates may not be stable or safe.
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